Error in Collection Visualizing

[reader-man]

Hi,
Thanks for the great VS plugin.

I tried it on my project, and it always gives an error:

, then i made the following Sample for you too see the problem place:
https://drive.google.com/drive/folders/0B2xC75mde6w0Z1pkUnJUNXlFa3c?usp=sharing

i'vs put a debug point in the Program.cs on:
var t = tst.TestList;
to try to visualize the "TestList", but the error always comes.

Environment:
Win 10 Pro 64bit
VS 2017 with the latest update
Debug Config [Any CPU] and x86 and x64
and copied the downloaded .dlls to:
Visual Studio 2017
We must copy the MLCollectionVisualizer2017.dll in this path:
C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\Common7\Packages\Debugger\Visualizers\

Regards.